TypeScriptToLua · Perryvw · Jun 21, 2021 · Jun 20, 2021
diff --git a/src/transpilation/resolve.ts b/src/transpilation/resolve.ts
@@ -103,19 +103,18 @@ function resolveDependency(
     // Check if file is a file in the project
     const resolvedPath = path.join(fileDirectory, dependency);
 
-    if (isProjectFile(resolvedPath, program)) {
-        // JSON files need their extension as part of the import path, caught by this branch
-        return resolvedPath;
-    }
-
-    const resolvedFile = resolvedPath + ".ts";
-    if (isProjectFile(resolvedFile, program)) {
-        return resolvedFile;
-    }
-
-    const projectIndexPath = path.resolve(resolvedPath, "index.ts");
-    if (isProjectFile(projectIndexPath, program)) {
-        return projectIndexPath;
+    const possibleProjectFiles = [
+        resolvedPath, // JSON files need their extension as part of the import path, caught by this branch,
+        resolvedPath + ".ts", // Regular ts file
+        path.join(resolvedPath, "index.ts"), // Index ts file,
+        resolvedPath + ".tsx", // tsx file
+        path.join(resolvedPath, "index.tsx"), // tsx index
+    ];
+
+    for (const possibleFile of possibleProjectFiles) {
+        if (isProjectFile(possibleFile, program)) {
+            return possibleFile;
+        }
     }
 
     // Check if this is a sibling of a required lua file
@@ -215,7 +214,9 @@ function isProjectFile(file: string, program: ts.Program): boolean {
 function hasSourceFileInProject(filePath: string, program: ts.Program) {
     const pathWithoutExtension = trimExtension(filePath);
     return (
-        isProjectFile(pathWithoutExtension + ".ts", program) || isProjectFile(pathWithoutExtension + ".json", program)
+        isProjectFile(pathWithoutExtension + ".ts", program) ||
+        isProjectFile(pathWithoutExtension + ".tsx", program) ||
+        isProjectFile(pathWithoutExtension + ".json", program)
     );
 }
 

diff --git a/test/transpile/module-resolution.spec.ts b/test/transpile/module-resolution.spec.ts
@@ -280,3 +280,18 @@ describe("module resolution project with dependencies built by tstl library mode
             .expectToEqual(expectedResult);
     });
 });
+
+// Test fix for https://github.com/TypeScriptToLua/TypeScriptToLua/issues/1037
+describe("module resolution with tsx", () => {
+    const projectPath = path.resolve(__dirname, "module-resolution", "project-with-tsx");
+
+    test("project with tsx files", () => {
+        util.testProject(path.join(projectPath, "tsconfig.json"))
+            .setMainFileName(path.join(projectPath, "main.tsx"))
+            .debug()
+            .expectToEqual({
+                result: "hello from other.tsx",
+                indexResult: "hello from dir/index.tsx",
+            });
+    });
+});
diff --git a/test/transpile/module-resolution/project-with-tsx/dir/index.tsx b/test/transpile/module-resolution/project-with-tsx/dir/index.tsx
@@ -0,0 +1,3 @@
+export function indexf() {
+    return "hello from dir/index.tsx";
+}
diff --git a/test/transpile/module-resolution/project-with-tsx/main.tsx b/test/transpile/module-resolution/project-with-tsx/main.tsx
@@ -0,0 +1,5 @@
+import { f } from "./other";
+import { indexf } from "./dir";
+
+export const result = f();
+export const indexResult = indexf();
diff --git a/test/transpile/module-resolution/project-with-tsx/other.tsx b/test/transpile/module-resolution/project-with-tsx/other.tsx
@@ -0,0 +1,3 @@
+export function f() {
+    return "hello from other.tsx";
+}
diff --git a/test/transpile/module-resolution/project-with-tsx/tsconfig.json b/test/transpile/module-resolution/project-with-tsx/tsconfig.json
@@ -0,0 +1,5 @@
+{
+    "compilerOptions": {
+        "jsx": "react"
+    }
+}